34 Exchanges. 



Vienna. — Verhandlungen der Kaiserlich Koniglichen Geolo- 



gischen Reichsanstalt. 

 Washington. — Year Book of the Department of Agriculture. 



„ Annual Report of the American Bureau of 



Ethnology. 

 , Annual Report of the Smithsonian Institution, Prc- 



ceedings of the United States Naticnal Museum, 

 Smithsonian Contributions to Knowledge, and 

 Smithsonian! Miscellaneous Collections. 

 „ Bulletin ofthe Philosophical Society of Washington. 



,, United States Geological Survey. 



WiEN. — Zoologisch Botanische Gesellschaft of VVien. 

 York. — Annual Report of Yorkshire Philosophical Society. 

 Zurich. — Vierteljahrsschrift der Naturforschenden Gesellschaft in 

 Zurich. 



